A residual inspired approach for fault localization in DES

Matthias Roth (1, 2) , Jean-Jacques Lesage (1) , Lothar Litz (2)

1 LURPA - Laboratoire Universitaire de Recherche en Production Automatisée
2 AT+ - Institute of Automatic Control

In this paper an approach for fault localization in Discrete Event Systems (DES) is proposed. The presented diagnosis method allows fault localization using a fault-free nominal system model. Via a systematic comparison of the observed and the expected system behavior, it is possible to determine a set of fault candidates. Inspired by residuals known from diagnosis in continuous systems, different set operations are presented that carry out this comparison. After a fault has been detected and a first estimate concerning its localization has been performed, a special algorithm analyzes the further system behavior in order to determine a more precise fault localization. The algorithm also works on the basis of the nominal system model. The method is explained using a manufacturing system example

Mots clés: Diagnosis; Discrete Event Systems; Fault localization

Domaines: Automatique / Robotique

Matthias Roth, Jean-Jacques Lesage, Lothar Litz. A residual inspired approach for fault localization in DES. 2nd IFAC Workshop on Dependable Control of Discrete Systems (DCDS'09), Jun 2009, Bari, Italy. paper 35. ⟨hal-00430015⟩